A light-year is:

a. the distance light travels in one year

b. about 19 trillion miles

c. based on the distance from the earth to the sun

d. all of the above

A spring required a force of 1.0 n to compress it 0.1 m. how much work is required to stretch the spring 0.4 m?

A ball of clay falls freely to the hard floor. it does not bounce noticeably, and it very quickly comes to rest. what then has happened to the energy the ball had while it was falling?

An electron experiences a magnetic force of magnitude 4.60 x 10^-15 N when moving at an angle of 60.0° with respect to a magnetic field of magnitude 3.50 x 10^-3 T. Find the speed of the electron.

Exercise can easily improve type 1 diabetes.

Why is the period of the Gupta Empire referred to as the Golden Age of India? a) It was a period in which the Rajputs emerged. b) It was a period in which the Guptas conquered the Romans. c) It was a time in which religion became less important.

Which wave characteristic has the unit hertz

A stretched spring has 5184 J of elastic potential energy and a spring constant of 16,200 N/m. What is the displacement of the spring?

A block of mass 1.3 kg is resting at the base of a frictionless ramp. A bullet of mass 50 g is traveling parallel to the ramp surface at 250 m/s. It collides with the block, enters it, and exits the other side at 100 m/s.

Metals are good thermal conductors - that is, when there is a temperature difference across their ends, they transfer energy very efficiently from the higher temperature end to the lower temperature end.

Some stars are so far away that their light hasn't reached Earth yet. A million years in the future, will the sources of light we see when we look up at night be the same? Why or Why not?